Malicious PDF — malware analysis report

Static analysis result for SHA-256 667c4570ad3a15bb…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 06:50:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6f63713023962f0bae0c0a172995b57b SHA-1: 438281e87cd29f857d3de81b28195aca85f9c228 SHA-256: 667c4570ad3a15bbb767764ff7986edce00893b68c3ae9a6f8762f2b5992a560
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game items and hacks, directing users to a known malicious redirector. The primary link, http://netcdn.co/app/479516143/how-to-get-minecraft-for-free-on-nintendo-switch-game-hack, is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/479516143/how-to-get-minecraft-for-free-on-nintendo-switch-game-hack In PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-workspacve-hacks_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/pubg-uc-kuwait_GM1330123889.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-roblox-jeans_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-ar2-spawn-hack_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-robux-giftcard-codes-july-12-2021_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/different-skywars-codes-for-free-coins-on-roblox_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/get-free-things-in-roblox_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/robux-for-free-no-password_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/spin-coin_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/how-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300B 22456 bytes
SHA-256: f1671684b4185535e9bdc766b26f786a8d03daea57a0d82d489a14c971d36400
font_01_sfnt_off000061e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E5 18504 bytes
SHA-256: 8af0a249c3c3e9a25bb13285b95d7887f867d932d2951fe3703759752fb28dcf